Generating secure repeatable passwords with OpenSSL

passgen

#!/bin/bash
# see http://www.openssl.org/docs/apps/passwd.html

DOMAIN=$1
PEPPER=55e730a3
SALT=`echo ${PEPPER}${DOMAIN} | shasum | cut -c 1-8`

openssl passwd -1 -salt $SALT | cut -d '$' -f 4

With version 7f63f1 I switched to combining the domain with a fixed PEPPER value.